platform/mihawk: Add system VPD EEPROM to I2C bus

Add VPD EEPROM type fix for planar VPD update.

Signed-off-by: Joy Chu <joy_chu@wistron.com>
[oliver: commit subject]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

platforms/astbmc/mihawk.c

@@ -229,6 +229,24 @@ static void mihawk_create_ocapi_i2c_bus(void)
 	}
 }
 
+/*
+ * HACK: Hostboot doesn't export the correct data for the system VPD EEPROM
+ *       for this system. So we need to work around it here.
+ */
+static void vpd_dt_fixup(void)
+{
+	struct dt_node *n = dt_find_by_path(dt_root,
+		"/xscom@603fc00000000/i2cm@a2000/i2c-bus@0/eeprom@50");
+
+	if (n) {
+		dt_check_del_prop(n, "compatible");
+		dt_add_property_string(n, "compatible", "atmel,24c512");
+
+		dt_check_del_prop(n, "label");
+		dt_add_property_string(n, "label", "system-vpd");
+	}
+}
+
 static bool mihawk_probe(void)
 {
 	if (!dt_node_is_compatible(dt_root, "ibm,mihawk") &&
@@ -241,6 +259,8 @@ static bool mihawk_probe(void)
 	/* Setup UART for use by OPAL (Linux hvc) */
 	uart_set_console_policy(UART_CONSOLE_OPAL);
 
+	vpd_dt_fixup();
+
 	mihawk_create_npu();
 	mihawk_create_ocapi_i2c_bus();